682491 has 4 divisors (see below), whose sum is σ = 909992. Its totient is φ = 454992.

The previous prime is 682489. The next prime is 682511. The reversal of 682491 is 194286.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 682491 - 2¹ = 682489 is a prime.

It is a D-number.

It is a Duffinian number.

682491 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 682491.

It is not an unprimeable number, because it can be changed into a prime (682411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113746 + ... + 113751.

It is an arithmetic number, because the mean of its divisors is an integer number (227498).

2⁶⁸²⁴⁹¹ is an apocalyptic number.

682491 is a deficient number, since it is larger than the sum of its proper divisors (227501).

682491 is a wasteful number, since it uses less digits than its factorization.

682491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227500.

The product of its digits is 3456, while the sum is 30.

The square root of 682491 is about 826.1301350272. The cubic root of 682491 is about 88.0438400706.

The spelling of 682491 in words is "six hundred eighty-two thousand, four hundred ninety-one".